5 Preparation
Installer reference guide
8
FDXM25~60F3V1B(9)
Split system air conditioners
4P550955-1 – 2018.07
4.2
System layout
b
c
a
e
d
f
g
h
a
Indoor unit
b
Outdoor unit
c
User interface
d
Suction air
e
Discharge air
f
Refrigerant interconnection cable
g
Drain pipe
h
Earth wiring
4.3
Combining units and options
4.3.1
Possible options for the indoor unit
Make sure you have the following mandatory options:
▪ User interface: Wired or wireless (refer to catalogues and
technical literature for selecting a suitable user interface)
5
Preparation
5.1
Overview: Preparation
This chapter describes what you have to do and know before going
on-site.
It contains information about:
▪ Preparing the installation site
▪ Preparing the refrigerant piping
▪ Preparing the electrical wiring
5.2
Preparing the installation site
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Choose the installation location with sufficient space for carrying
the unit in and out of the site.
WARNING
Do NOT install the air conditioner at any place where
flammable gas may leak out. If the gas leaks out and stays
around the air conditioner, a fire may break out.
5.2.1
Installation site requirements of the
indoor unit
INFORMATION
Also read the following requirements:
▪ General installation site requirements. See the
"General safety precautions" chapter.
▪ Refrigerant
piping
requirements
(length,
height
difference). See further in this "Preparation" chapter.
INFORMATION
The sound pressure level is less than 70 dBA.
NOTICE
The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 metre may not be sufficient.
▪
Fluorescent lights
. When installing a wireless user interface in a
room with fluorescent lights, mind the following to avoid
interference:
▪ Install the wireless user interface as close as possible to the
indoor unit.
▪ Install the indoor unit as far as possible from the fluorescent
lights.
▪
Signal receiver with built-in temperature sensor
must be
installed on a location:
▪ near the intake vent (when installation near the intake vent is
not possible, install 1.5 m above the floor)
▪ which is not exposed to cold or hot air.
▪ where signal may not be blocked by curtain, etc.
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
▪ Choose a location where the hot/cold air discharged from the unit
or the operation noise, will NOT disturb anyone.
WARNING
Do NOT place objects below the indoor and/or outdoor unit
that may get wet. Otherwise condensation on the main unit
or refrigerant pipes, air filter dirt or drain blockage may
cause dripping, and objects under the unit may get dirty or
damaged.
▪
Air flow.
Make sure nothing blocks the air flow.
▪
Drainage.
Make sure condensation water can be evacuated
properly.
▪
Ceiling insulation
. When conditions in the ceiling exceed 30°C
and a relative humidity of 80%, or when fresh air is inducted into
the ceiling, then additional insulation is required (minimum 10 mm
thickness, polyethylene foam).
